[SCSI] ibmvfc: Fix locking in ibmvfc_remove

Need to grab the host lock around the call to ibmvfc_link_down.
Signed-off-by: NBrian King <brking@linux.vnet.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

drivers/scsi/ibmvscsi/ibmvfc.c

@@ -4420,7 +4420,11 @@ static int ibmvfc_remove(struct vio_dev *vdev)
 
 	ENTER;
 	ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr);
+
+	spin_lock_irqsave(vhost->host->host_lock, flags);
 	ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE);
+	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+
 	ibmvfc_wait_while_resetting(vhost);
 	ibmvfc_release_crq_queue(vhost);
 	kthread_stop(vhost->work_thread);